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National Down Syndrome Society (NDSS) — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Special Needs Kids →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
gcdss.org ↗	77 match 1 shared topics	Gulf Coast Down Syndrome Society	en	special-needs-kids Prismic	robotsllmsaihumans	emailphone	none
ssmdownsyndromesociety.com ↗	74 match 1 shared topics	Home - Sault Ste. Marie Down Syndrome Society	en	special-needs-kids WordPress	robots llmsaihumans	emailphone	none
ndsccenter.org ↗	74 match 1 shared topics	Home : National Down Syndrome Congress	United States~ en	special-needs-kids	robotsllmsaihumans	email phone	none
gatewaydsa.org ↗	73 match 1 shared topics	HOME - Gateway Down Syndrome Association	en	special-needs-kids WordPress Square Online	robots llmsaihumans	emailphone	none
ncdsalliance.com ↗	73 match 1 shared topics	North Carolina Down Syndrome Alliance	en	special-needs-kids WordPress	robotsllmsaihumans	email phone	none
cvdsa.net ↗	72 match 1 shared topics	Chattahoochee Valley Down Syndrome Association, Columbus Georgia	United States~ en	special-needs-kids	robotsllmsaihumans	emailphone	partial · 8
cvdsa.org ↗	72 match 1 shared topics	Down Syndrome Association of Greater Columbus, Columbus Georgia	United States~ en	special-needs-kids	robotsllmsaihumans	emailphone	none
alittlebitdifferentalotthesame.com ↗	72 match 1 shared topics	alittlebitdifferentalotthesame – "Adulting" with Down Syndrome	en	special-needs-kids WordPress	robotsllmsaihumans	emailphone	none
babynoah.com.au ↗	70 match 1 shared topics	Baby Noah's Story – Fighting for My Child Who Has Down Syndrome	Australia en	special-needs-kids WordPress	robotsllmsaihumans	emailphone	none
akdownsyndrome.com ↗	70 match 1 shared topics	Alaska Down Syndrome Network - Connect, Support, Advocate	en	special-needs-kids Squarespace Magento	robotsllmsaihumans	emailphone	none
akdownsyndrome.org ↗	70 match 1 shared topics	Alaska Down Syndrome Network - Connect, Support, Advocate	en	special-needs-kids Squarespace Magento	robotsllmsaihumans	emailphone	none
dadsofdownsyndrome.org ↗	69 match 1 shared topics	Home Page - Dads of Down syndrome	en	special-needs-kids WordPress	robots llmsaihumans	emailphone	none
dadsnational.org ↗	69 match 1 shared topics	Dads Appreciating Down Syndrome - HOME	en	special-needs-kids Joomla	robotsllmsaihumans	emailphone	none
dadsofarkansas.org ↗	69 match 1 shared topics	Dads Appreciating Down Syndrome (DADS)	en	special-needs-kids WordPress	robots llmsaihumans	emailphone	none
nads.org ↗	68 match 1 shared topics	National Association for Down Syndrome \| Serving the Down Syndrome community since 1960	United States~ en	special-needs-kids WordPress WooCommerce	robotsllmsaihumans	emailphone	none
alltheupsanddowns.com ↗	68 match 1 shared topics	All the Ups and Downs – stories of down syndrome, parenting, and things in between	en	special-needs-kids WordPress	robotsllmsaihumans	emailphone	none
mencap.net ↗	67 match 1 shared topics	Learning Disability - Down syndrome - Williams syndrome \| Mencap	en	special-needs-kids Drupal	robotsllmsaihumans	emailphone	none
mencap.org ↗	67 match 1 shared topics	Learning Disability - Down syndrome - Williams syndrome \| Mencap	en	special-needs-kids Drupal	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.